December weather forecast
Dover, NH

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Weather in December

In December, winter makes its presence known in Dover with temperatures descending rapidly. The month witnesses 3.27" (83mm) of snowfall; a significant increase, ushering the city into the snowy season. January extends this cold and snowy weather, making the city a winter haven once again. The festive spirit blends well with the frosty weather, making December's chilly temperatures and snowfall, a charming backdrop to the city's holiday celebrations.

Temperature

In Dover, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 46.6°F (8.1°C) to a wintry 37°F (2.8°C). Dover throughout December, records an average low-temperature of 27.5°F (-2.5°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

The wettest months are June and December, with an average 2.13" (54mm) of rainfall.

Snowfall

January through April, October through December are months with snowfall. In Dover, New Hampshire, during December, snow falls for 5.4 days and regularly aggregates up to 3.27" (83mm) of snow. In Dover, New Hampshire, during the entire year, snow falls for 28.5 days and aggregates up to 14.25" (362mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 0min of daylight.
On the first day of December, sunrise is at 6:56 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:18 pm EST.

Sunshine

February and December, with an average of 4.9h of sunshine, are months with the least sunshine.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Dover. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.

Frequently asked questions

How cold is it in Dover in December?

In December, the average high-temperature and low-temperature in Dover, New Hampshire, are 37°F (2.8°C) and 27.5°F (-2.5°C) respectively.

What is the average humidity in December in Dover?

In December, the average relative humidity in Dover, New Hampshire, is 78%.

What is the wettest month in Dover?

The months with the most rainfall in Dover, New Hampshire, are June and December, with an average 2.13" (54mm) of precipitation.

How many days does it rain in December in Dover?

In Dover, in December, it is raining for 8.5 days, with typically 2.13" (54mm) of accumulated precipitation.

How much does it snow in Dover in December?

In Dover, New Hampshire, in December, snow falls for 5.4 days, with typically accumulated 3.27" (83mm) of snow.

What is the month with the shortest days in Dover?

With an average of 9h and 0min of daylight, December has the shortest days of the year in Dover.

What is the average length of the day in December in Dover?

The average day length in December in Dover, New Hampshire, is 9h and 3min.

When is the sunrise / sunset in December in Dover?

In December, on the first day of the month, sunrise is at 6:56 am and sunset at 4:09 pm. On the last day of the month, in Dover, sunrise is at 7:15 am and sunset at 4:18 pm EST.

What are the months with the least sunshine in Dover?

The months with the least sunshine are February and December, with an average of 4.9h of sunshine.

How long on average sun shines in December in Dover?

In December, the average sunshine duration is 4.9h.

What are the months with the lowest UV index in Dover?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Dover?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Dover, NH

Average temperature in December - Dover, NH
  • Average high temperature in December: 37°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in December
Dover, NH

Average pressure in December - Dover, NH
  • Average pressure in December: 30.03"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Dover, NH

Average wind speed in December - Dover, NH
  • Average wind speed in December: 10.4mph

The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

Average humidity in December
Dover, NH

Average humidity in December - Dover, NH
  • Average humidity in December: 78%

The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are April and November (75%).

Average rainfall in December
Dover, NH

Average rainfall in December - Dover, NH
  • Average rainfall in December: 2.13"

The wettest months (with the highest rainfall) are June and December (2.13").
The driest month (with the least rainfall) is September (1.26").

Average rainfall days in December
Dover, NH

Average rainfall days in December - Dover, NH
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is July (14.6 days).
The months with the least rainy days are January and February (6.3 days).

Average snowfall in December
Dover, NH

Average snowfall in December - Dover, NH
  • Average snowfall in December: 3.27"

The month with the highest snowfall is February (3.86").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Dover, NH

Average snowfall days in December - Dover, NH
  • Average snowfall days in December: 5.4 days

The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Dover, NH

Average daylight in December / Average sunshine in December - Dover, NH
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

Average sunshine days in December
Dover, NH

Average sunshine days in December - Dover, NH
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (14.3 days).

Average UV index in December
Dover, NH

Average UV index in December - Dover, NH
  • Average UV index in December: 2

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December
Dover, NH

Average cloud cover in December - Dover, NH
  • Average cloud cover in December: 47

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in December
Dover, NH

Average visibility in December - Dover, NH
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Dover, New Hampshire, USA

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